Vugen unable to replay the script

Hi,

I have downloaded Loadrunner 12.20 trial version.

I am able to create a script but getting below error when I try to replay it:

Action.c(4): web_add_header("Upgrade-Insecure-Requests") was successful   [MsgId: MMSG-26392]
Action.c(7): web_url("WebTours") started   [MsgId: MMSG-26355]
Action.c(7): Error -27789: Server "localhost" has shut down the connection prematurely   [MsgId: MERR-27789]
Action.c(7): web_url("WebTours") highest severity level was "ERROR", 0 body bytes, 0 header bytes   [MsgId: MMSG-26388]
Ending action Action.